[ Version ( since = "2.14" ) ]
public void set_icon_from_icon_name (string? icon_name, int size)
Sets the icon of the tooltip (which is in front of the text) to be the icon indicated by icon_name with the size indicated
by size.
If icon_name is null, the image will be hidden.
| this |
a `GtkTooltip` |
| icon_name |
an icon name |